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Hadronic contributions to the anomalous magnetic moment of the muon from Lattice QCD

In: High Performance Computing in Science and Engineering '21

Author

Listed:
  • M. Cè

    (CERN, Theoretical Physics Department)

  • E.-H. Chao

    (Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

  • A. Gérardin

    (Aix Marseille Univ, Université de Toulon, CNRS, CPT)

  • J. R. Green

    (CERN, Theoretical Physics Department)

  • G. von Hippel

    (Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

  • B. Hörz

    (Lawrence Berkeley National Laboratory, Nuclear Science Division)

  • R. J. Hudspith

    (Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

  • H. B. Meyer

    (Johannes Gutenberg Universität, Helmholtz Institut Mainz
    Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

  • K. Miura

    (Johannes Gutenberg Universität, Helmholtz Institut Mainz
    GSI Helmholtzzentrum für Schwerionenforschung
    Nagoya University, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe)

  • D. Mohler

    (GSI Helmholtzzentrum für Schwerionenforschung)

  • K. Ottnad

    (Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

  • S. Paul

    (Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

  • A. Risch

    (Deutsches Elektronen-Synchrotron DESY, John von Neumann Institute for Computing NIC)

  • T. San José

    (Johannes Gutenberg Universität, Helmholtz Institut Mainz
    GSI Helmholtzzentrum für Schwerionenforschung
    Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

  • H. Wittig

    (Johannes Gutenberg Universität, Helmholtz Institut Mainz
    Universität Mainz, Institut für Kernphysik and PRISMA+ Cluster of Excellence)

Abstract

The recently reported new measurement of the anomalous magnetic moment of the muon, 𝑎𝜇, by the E989 collaboration at Fermilab has increased the tension with the Standard Model (SM) prediction to 4.2 standard deviations. In order to increase the sensitivity of SM tests, the precision of the theoretical prediction, which is limited by the strong interaction, must be further improved. In our project we employ lattice QCD to compute the leading hadronic contributions to 𝑎𝜇 and various other precision observables, such as the energy dependence (“running”) of the electromagnetic coupling, 𝛼, and the electroweak mixing angle, sin2 𝜃W. Here we report on the performance of our simulation codes used for the generation of gauge ensembles at (near-)physical pion masses and fine lattice spacings. Furthermore, we present results for the hadronic running of 𝛼, the electroweak mixing angle, as well as the hadronic vacuum polarisation and light-by-light scattering contributions to 𝑎𝜇. Results from an ancillary calculation of the spectrum in the isovector channel are crucial in order to further increase the precision of our determination of the hadronic vacuum polarisation contribution.

Suggested Citation

  • M. Cè & E.-H. Chao & A. Gérardin & J. R. Green & G. von Hippel & B. Hörz & R. J. Hudspith & H. B. Meyer & K. Miura & D. Mohler & K. Ottnad & S. Paul & A. Risch & T. San José & H. Wittig, 2023. "Hadronic contributions to the anomalous magnetic moment of the muon from Lattice QCD," Springer Books, in: Wolfgang E. Nagel & Dietmar H. Kröner & Michael M. Resch (ed.), High Performance Computing in Science and Engineering '21, pages 19-33, Springer.
    • Handle: RePEc:spr:sprchp:978-3-031-17937-2_2
    DOI: 10.1007/978-3-031-17937-2_2
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